Spyder 2-Piece Mach Blue Hex Shank Step Drill Bit Set

Details Spyder Mach-Blue high speed steel (HSS) bits are the pro's choice for precision drilling and extended bit life. The Armor Plating combined with the advanced M-series alloy tool steel construction and proprietary heat treatment make these bits truly revolutionary. They retain sharper cutting edges longer, and have reduced heat build-up and cutting friction. This 2 piece set is ideal for drilling thru mild metals or enlarging existing holes in sheet metals from 1/8" up to 7/8".